JPH069768U - Dust collector for plasma cutting machine - Google Patents

Abstract

(57) [Summary] [Objective] When plasma cutting the plate material near the edge of the surface plate, the generated dust leaks to the outside of the duct, but compressed air is ejected from the blowing nozzle and collected. Dust is captured by positively generating a flow toward the dust duct. [Structure] In a plasma cutting machine in which a plate 6 is placed on a surface plate 7 in which a plurality of struts 8 are arranged in parallel and the plate is cut by a plasma torch 3 attached to a main body 2. , A dust collecting duct 10 in the center of the surface plate 7
And a blowing nozzle 11 for ejecting air is arranged at the end of the strut 8 between the struts 8 in the main body 2.
A dust collector for a plasma cutting machine, which is configured to form an air flow flowing from the end portion of the dust collector toward the dust collecting duct 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dust collector for a plasma cutting machine, and more particularly to a dust collector for a plasma cutting machine that collects dust generated when a metal plate material such as a steel plate is cut by the plasma cutting machine. is there.

[0002]

[Prior art]

 Generally, when a metal plate material such as a steel plate is cut by a plasma cutting machine, dust is generated, and therefore a dust collecting device is provided to collect the dust. In particular, when cutting large steel plates such as steel plates for shipbuilding, this steel plate is placed on a surface plate with a plurality of struts arranged in parallel, and a dust collection duct is installed in the center of this surface plate. Dust is being collected.

Specifically, referring to FIGS. 1 and 2, the conventional technique will be described. A plasma torch 3 and a marking torch 4 are provided on a main body 2 of a plasma cutting machine 1, and the main body 2 is mounted on a rail 5. It is designed to run along. A platen 7 on which a steel plate 6 as a material to be cut is placed is constructed by vertically arranging a plurality of struts 8 on a lower plate, and a duct 9 is formed by each strut 8 and the steel plate 6. It is like this. A dust-collecting duct 10 is provided between the struts 8 extending opposite to each other, and is sucked by a suction device (not shown). Then, the steel plate 6 is cut by the plasma torch 3 supported by the main body 2, and the dust D generated at this time is sucked into the dust collecting duct 10 through the duct 9 formed between the struts 8 and collected. It is supposed to be done.

[0004]

[Problems to be solved by the device]

 By the way, in the dust collector of such a plasma cutting machine, since the dust D is sucked and collected from the dust collecting duct 10 provided in the central portion, the steel plate 6 is supported by the end 8a of the strut 8. The dust D ′ generated when cutting is not sufficiently collected because the suction force of the duct 9 is weak, and is diffused and discharged from the end of the duct 9 to the outside.

[0005]

[Means for Solving the Problems]

 The present invention has been made in order to solve the problems of the prior art, and a plasma torch mounted on the main body by mounting a plate material on a surface plate having a plurality of struts arranged in a row. In the plasma cutting machine configured to cut the plate material, a dust collecting duct is arranged at the center of the surface plate, and a blowing nozzle for blowing air is arranged at the end of the main body between the struts. (EN) Provided is a dust collecting device in a plasma cutting machine, which is configured to form an air flow flowing from the end of a strut toward a dust collecting duct.

The blow-off nozzle may open and close the shut-off valve so that compressed air is jetted when the plasma torch is activated, for example, when the plasma torch is lowered to the cutting position. It is also possible to inject compressed air when the plasma torch moves near the end of the strut where dust is easily discharged from the duct. Most of the metal plate materials to be cut are steel plates, but other plate materials can also be applied.

[0007]

[Work]

 According to the dust collector of the plasma cutting machine having such a structure, the dust is sucked and collected from the dust collecting duct provided in the center of the duct formed by the platen on which the struts are set up and the steel plate. However, the dust at the end of the duct is sent from the end side of the strut to the center of the strut by the air ejected from the blowing nozzle and is sucked into the dust collection duct, so the dust is released and diffused to the outside. There is no.

The jet of air from the jet nozzle is preferably configured to work in conjunction with the plasma torch. Specifically, when the plasma torch descends and reaches the cutting position, its position is detected by position detecting means such as a limit switch, and a signal is given to a shutoff valve such as a solenoid valve to open it and eject air. Therefore, it is possible to prevent wasteful use of compressed air.

[0009]

【Example】

 An embodiment of a dust collector in a plasma cutting machine according to the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a front view of the plasma cutting machine 1, in which blowing nozzles 11 are attached to both ends of a main body 2 of the plasma cutting machine 1, and position detectors 12 such as limit switches are attached to the plasma torch 3, respectively. . One end of an air supply pipe 14 is connected to the blowout nozzle 11 via a shutoff valve 13 (a solenoid valve), and the other end of the air supply pipe 14 is connected to an air supply source 15 such as a factory air supply device. Has been done.

A signal S from a position detector 12 provided on the plasma torch 3 is guided to the shutoff valve 13 as shown in FIG. 3, and the signal S causes the control device 16 to open and close the valve. Has become. Specifically, when the plasma torch 3 descends and reaches a predetermined operating position, the position detector 12 such as a limit switch is activated to generate a signal S. The shutoff valve 13 is opened by this signal S, and the pressure air a is ejected from the blow-out nozzle 11 inward of the duct 9.

The body 2 is further provided with a guide 18 for opening and closing the dust collection duct 10. More specifically, as shown in FIGS. 4 and 5, a plurality of opening / closing dampers 20 are provided on the side surface of the dust collecting duct 10 in the length direction thereof. The opening / closing damper 20 is attached by a hinge 21 so as to be rotatable in the directions of arrows u to d, and an arm 23 having a roller 22 is provided.

[0012] a guide 18 provided on the main body 2 ceiling 18a, guide walls 18b are bent downward from this across, 18c are formed, the guide walls 18b, 18c are spacing enlarged portion L ₁ and the narrow隘部And L ₂ and L ₂ are formed. When the roller 22 reaches the enlarged portion L ₁ of the guide walls 16b and 16c, the opening / closing damper 20 is rotated in the d direction and closed. When the roller 22 reaches the narrow portion L ₂ , the opening / closing damper 20 is rotated in the u direction to be opened. By opening the opening / closing damper 20, the duct 9 on the surface plate 7 and the dust collecting duct 10 communicate with each other.

With the above configuration, in the dust collector of the plasma cutting machine 1, when the steel plate 6 placed on the strut 8 is to be cut, the plasma torch 3 is lowered by the operating device. Lower to cutting position. Then, the detector 12 detects the position of the plasma torch 3 and transmits a signal S to the control device 16, which supplies the signal S to the on-off valve 13 which is an electromagnetic valve and opens it. .

Then, the pressure air a is ejected from the ejection nozzle 11 into the duct 9. Of course, at this time, the narrow portion L _{2 of the} guide 18 is in contact with the roller 22, the opening / closing damper 20 is opened, and the duct 9 and the inside of the dust collecting duct 10 communicate with each other. Therefore, the dust D generated in the duct 9 is positively transferred from the duct 9 into the dust collecting duct 10. When the cut portion of the steel plate 6 moves to the next duct 9 ', the blowout nozzle 11 also moves to this duct 9', and the opening / closing damper located in this duct 9'is also opened. When the work of cutting the steel plate 6 is completed in this way, the plasma torch 3 rises and the transmission of the signal S is stopped, and the shutoff valve 13 is closed, so that the supply of the compressed air a is stopped. As described above, by detecting the position of the plasma torch 3, that is, the operating state, and blowing the compressed air a from the blowing nozzle 11, the amount of the compressed air consumed can be minimized.

[0015]

[Effect of device]

 The dust collector of the plasma cutting machine according to the present invention is a plasma plate in which a steel plate is placed on a surface plate having a plurality of struts arranged in parallel and the steel plate is cut by a plasma torch attached to the main body. In the cutting machine, a dust collecting duct is arranged at the center of the surface plate, and a blow nozzle for ejecting air is arranged at the ends of the struts between the struts, and flows from the end of the struts toward the dust collecting duct. It is configured to form a stream of air.

Therefore, the compressed air is supplied to the end of the duct formed by the steel plate and the strut to transfer the dust to the dust collecting duct side, so that the dust is prevented from diffusing to the outside. Air gripping force Since the air is also supplied in conjunction with the plasma torch, the compressed air can be effectively used.

[Brief description of drawings]

FIG. 1 is a front view of a plasma cutting machine according to an embodiment of a dust collector in a plasma cutting machine according to the present invention.

FIG. 2 is a side view showing a state in which a plate material to be cut is supported on a strut of a surface plate.

FIG. 3 is a diagram showing a compressed air supply system.

FIG. 4 is a front view of a dust collection duct.

FIG. 5 is a plan view of a dust collection duct.

[Explanation of symbols]

1 Plasma cutting machine 2 Main body 3 Plasma torch 4 Marking torch 6 Steel plate 7 Surface plate 8
Strut 9 Duct 10 Dust collection duct 11 Blowing nozzle
12 Limit switch 13 Isolation valve (solenoid valve) 14 Air supply pipe 15 Air supply source 16 Guide 17 Open / close damper

Claims (1)

[Scope of utility model registration request] 1. A plasma cutting machine in which a metal plate material is placed on a surface plate having a plurality of struts arranged in a row and a plasma torch attached to the main body cuts the metal plate material. A dust collection duct is arranged in the center of the surface plate, and a blowout nozzle for ejecting air is arranged at the ends of the struts between the struts to form an air flow flowing in the direction of the dust collection duct from the ends of the struts. Dust collector for plasma cutting machine.